基于RSM的汽车散热器翅片性能优化设计
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摘要
为了在保证翅片综合性能评价因子JF不衰减的情况下,力求减轻翅片重量、提升百叶窗翅片式散热器的气侧性能,在计算流体力学(CFD)的基础上,分别以百叶窗翅片与散热器整体为对象依次求解换热性能,并通过风洞散热试验验证了该仿真方法的可靠性。借助上述CFD数值仿真方法,依据L25(56)正交试验表研究了气侧结构参数对各评价指标的敏感程度。经Box-Behnken试验拟合出综合性能评价因子JF、换热因子j及质量评价指标m/Fp关于各敏感参数的代理模型,联合求解优化数学模型得到了质量更低、性能较优的百叶窗翅片参数组合。经进一步仿真验证,优化后百叶窗翅片的质量减轻了约15. 5%,综合性能评价因子JF与换热因子j大致保持不变。
In order to improve the gas side performance of louvered fin by reducing the weight of the fin,meanwhile,to achieve the goal of maintaining the comprehensive evaluation factor of the louvered fin,firstly,the heat transfer performance of louvered fin and whole radiator was respectively carried out with the help of Computational Fluid Dynamics( CFD),and the result was verified by wind-tunnel experiment. And then,according to the method of CFD,the trend and the extent of each structural parameter influence on each evaluation index were obtained by L25( 56) orthogonal test table. In the end,quadratic polynomial prediction models of the comprehensive evaluation factor JF,the heat transfer factor j and the weight evaluation index m/Fpfor each sensitive parameter were fitted by Box-Behnken test,and optimal fin structural parameters combination for improving performance and reducing weight of louvered fin were obtained. After further simulation,the weight of the louvered fin is reduced by 15. 5 %,and the comprehensive performance evaluation factor JF is also slightly improved.
In order to improve the gas side performance of louvered fin by reducing the weight of the fin,meanwhile,to achieve the goal of maintaining the comprehensive evaluation factor of the louvered fin,firstly,the heat transfer performance of louvered fin and whole radiator was respectively carried out with the help of Computational Fluid Dynamics( CFD),and the result was verified by wind-tunnel experiment. And then,according to the method of CFD,the trend and the extent of each structural parameter influence on each evaluation index were obtained by L25( 56) orthogonal test table. In the end,quadratic polynomial prediction models of the comprehensive evaluation factor JF,the heat transfer factor j and the weight evaluation index m/Fpfor each sensitive parameter were fitted by Box-Behnken test,and optimal fin structural parameters combination for improving performance and reducing weight of louvered fin were obtained. After further simulation,the weight of the louvered fin is reduced by 15. 5 %,and the comprehensive performance evaluation factor JF is also slightly improved.
引文
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[11]王小庆,金先龙.大规模四面体网格并行生成方法[J].振动与冲击,2014,33(21):102-107.
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[13]邢奕,王志强,洪晨,等.基于RSM模型对污泥联合调理的参数优化[J].中国环境科学,2014,34(11):2866-2873.
[2]袁志群,谷正气,何忆斌,等.汽车散热器结构参数对空气流动阻力特性影响数值分析[J].科技导报,2008,26(21):52-56.
[3]王迎慧,赵凌骁,邵楠.翅窗间距比对管带式散热器综合性能的影响[J].内燃机工程,2016,37(6):229-234.
[4]OLIET C,OLIVA A,CASTRO J,et al.Parametric studies on automotive radiators[J].Applied Thermal Engineering,2007,27(11):2033-2043.
[5]KIM,JOUNG Ha,YUN,et al.Heat-transfer and friction characteristics for the louver-fin heat exchanger[J].Journal of Thermophysics and Heat Transfer,2004,18(1):58-61.
[6]WANG K,LIU Z C,LIU T,et al.Research on the influence of louver fin tilt angle on heat transfer at relatively high reynolds number[J].Journal of Engineering Thermophysics,2014,35(2):375-377.
[7]HESSELGREAVES J E.Compact Heat Exchangers[M].New York:McGraw-Hill,2001.
[8]MONTGOMERY D C.Design and Analysis of Experiments[M].New York:John Wiley,1984.
[9]高绪栋.管壳式换热器的数值模拟及优化设计[D].济南:山东大学,2009.
[10]ANISHEK S,SONY R,JAYADEEP Kumar J,et al.Performance Analysis and Optimisation of an Oil Natural Air Natural Power Transformer Radiator[J].Procedia Technology,2016(24):428-435.
[11]王小庆,金先龙.大规模四面体网格并行生成方法[J].振动与冲击,2014,33(21):102-107.
[12]杨艳慧,刘东,贺子延,等.基于响应面法(RSM)的锻造预成形多目标优化设计[J].稀有金属材料与工程,2009,38(6):1019-1024.
[13]邢奕,王志强,洪晨,等.基于RSM模型对污泥联合调理的参数优化[J].中国环境科学,2014,34(11):2866-2873.